Self-threading shuttle



Aug. 6, 1929. J. R. SHUTT ET AL SELF THREADING SHUTTLE Filed Nov. 7, 1927 Patented Aug. 6, 1929.

[UNITED STATES` PATENT OFFICE.

JESSE RAYMOND SHUTT ANI) ALBERT A. GORDON, OF WORCESTER, MASSACHUSETTS,

.ASSIGNORS TO CROMPTON & KNOWLESLOOM WORKS, OF WORCESTER, MASSACHU- SETTS, A CORPORATION OF MASSACHUSETTS.

SELF-THREADING SHUTTLE.

Application filed November 7, 1527. Serial No. 231,443.

This invention relates to a self-threadiire,T shuttle particularly adapted for use with `silk weft or other fine weft having;` similar characteristics.

It is the principal object of our invention to provide an improved threzuling mechanism for such a shuttle, designed to readily receive and retain thethread and to provide a yieldingr tension or slacktake-ijip therefor.

`With this general object in view, a feature of our invention in its preferred form relates to the infovision of two swinging members cooperating to yieldingrly tension the :fillingr yarn or weft an d to take up the slack thereof.

Ourinvention further relates to arrangements and combinations of parts lwhich will.

c be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings in which Fig'. 1 is a plan view of a shuttle embodyingour iini'nfovements;

Fi g. 2 is a parti al sectional plan View, taken through the threading endof the shuttle;

Fig.Y 3 is a view similar to Fig. 2 but showing the parts in different position;

F ig. L1 is a partial sectional side elevation, lookingl in thedirection of the arrow 4 in Fw. 2; and

Figs. 5. 6 and 7 are sectional end elevations, taken along the lines 5 5, 6 6 and 7--7 of Fig. 2 respectively.

Referring to the drawings, we have shown a shuttle S having a bobbin B mounted therein and preferably having friction material 10 secured along one side of the shuttle and lightly engaging the weft W on the bobbin.

At the front end of the shuttle, a recess or thread passage 12 is formed extending downward form the upper side of the shuttle and extending' longitudinally 'forward along the axis of the shuttle.

At its front end, the passage 12 is provided with an oil'set portion 13 itoi'iiiing a lateral outlet for the thread and having pins 111 mounted vertically therein and providing a guideway or eyefor the shifittle.

A swinging arm 2() is pivoted at 21 in a slot 22 formed in the rear side wall of the shuttle, and a rearward projection 23 of the arm 2() has an elastic member 211, preferably of rubber cord, connected thereto for yieldingly tensioning said arm. The arm 20 eX- tends transversely into the passage 12 and has an otl'set portion 25 extending for ard along" the passage 12. At its front end, the arm 20 is provided with a hook-shaiiied end portion 27, and .'aid arm is preferably arched as indicated at 23 (Fig. 4l) adiacenti-,lie end portion27. l

A second tension member 3() is pivoted at 31 in the passage 12 and is provided with a hook-shaped thread-engaging end portion 32 (Figs. 2 and 4.). A rearward extension of the arm 30 is received in a slot 33 (Fig. 6) in the lower face of a guide member 35` mounted 0n the portion 25 of the tension arm 20.

The guide member 35 thus forms a connection between the two tension arms, effective to cause the threai'l-engaging portions of the two arms to move simultaneously in opposite directions. The upper portieri of the guide 35 is shaped to assist in `guidinigfthe weft lV to threading` position. *i i A metal casting or support 4() .is preferably mounted in the passage 12, lnfovidinga support for the pivot 31 of the tension niember 30, also providing thread guiding' portions 41 and 12 (Fig. 7), and having a depending i'iortion43 supporting one of the thread guiding members 14. The support 40 also has a rear `guide portion or plate 4 7 (Fig. 5) to receive the thread lV as .it enters the threadingl mechanism. f

Having described the details of construction of our improved threading` mechanism, the o'iiieration thereof is as follows:

Vhen a fresh shuttle is inserted and the thread W is drawn forward through the shut-- tle eye by the first flight of the shuttle, the thread passes downward around the plate 417 (Fig. 5) and guide member 35 (Fig. G) and enters the hook-shaped end 27 of the portion 25 of the tension arm 20, as shown in Figs.' 2 and 4t. As the shuttle makes its return flight, the thread is drawn into the lateral passage 13 between the gui de pins 14. and the tensidn of the thread swings the arm 20 to the position shown in F ig'. 3, but with the thread stretched across the arch 28.

At the same time, the hook-shaped end 32 of the second arm 30 moves rearward under the arch 28 and engages thethread where it is stretched across the arch. causing the thread to be caught under the hooked end 32 of the arm 30. The thread thus assumes the position indicated in Fig. 3.

When the tension is relieved, the thread- Cil engaging ends of the arms 2O and 3() ivill be separated, assuming the normal position shown in Fig. l, but Whenever the tension is increased the parts Will return to the position shown in Fig. 3.

The device thus yieldingly tensions the Wett at all times and is adapted to immediately take up slack Wett and to prevent snarling or kinlring of the iilling when slaclness occurs.

rl`he device is exceedingly simple, having only tvvo nioving parts and has been found extremely ivell adapted for the purpose for Which it is designed.

Having thus described our invention and the advantages thereof, vve do not wish to be limited to the details herein disclosed, otherivise than set lorth in the claims, but what ive claim is Y 1. A seit-threading shuttle having an open thrwad passage, a tension aizm mounted to swing transverselj,y of the shuttle in said passage, a second movable tension arm, said being operat'vely connected to e'tl'eet simultaneous thread-tensioning movements in opposite directions, and means to provide ten-- sion for said arms.

2. A seit-threading shuttle having an open thread passage, a tension arm mounted to swing transversely olf the shuttle in said passage, a second movable tensionY arm., and. means to tension said `first arm, said iii-st arm being connected to actuate said second arm and to thereby move the thread-engaging portions ot said tivo arms simultaneously in opposite directions.

3. A self-threading shuttle having an open thread passage, a tension arm mounted to siving transversely ot the shuttle in said passage, a second movable tension arm, yielding means to move said arms, said arms having hook-shaped Wett-engaging portions engaging the thread on opposite sides thereoi", said 'in predetermined relation and in opposite directions.

d. A self-threading shuttle having an open thread passage, a tension arm mounted to swing transversely of the shuttle in said passage, a second movable tension arm, and yielding means te move said first arm, said lirst arm having a thread guiding member mounted thereon and operatively engaging said second arm to move the thread-engaging portions ot said arms simultaneously in opposite directions.

5. A self-threading shuttle having an open thread passage, a tension arm mounted to siving transversely ot' the shuttle in said passage, a second movable tension arm, and yielding means to move said arms, said first arm having a thread-engaging end portion and having an upwardly arched portion adjacent thereto, and said second arm having a hookshaped end movable under said arched portion to engage the iveft adjacent said threadengaging end portion.

(i. A self-threading shuttle having an open thread passage, a tension arm mounted to swing transversely ot' the shuttle in said passage, a second movable tension arm, and yielding means to move said arms, said first arm having a thread engaging end portion and. having an upwardly arched portion adjacent thereto, and said second arm having a hookshaged end movable under said arched portion to engage the iveft adjacent said threadengaging end portion, and said hook-shaped end extending below the plane of movement otl said iirst tension arm to prevent unthread ing of the shuttle.

In testimony whereof vve have hereunto affixed our signatures.

JESSE R. SHUTT. ALBERT A. GORDON. 

